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Genomic Organization of Repetitive DNA Elements and Extensive Karyotype Diversity of Silurid Catfishes (Teleostei: Siluriformes): A Comparative Cytogenetic Approach
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SYSNO ASEP 0508614 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Genomic Organization of Repetitive DNA Elements and Extensive Karyotype Diversity of Silurid Catfishes (Teleostei: Siluriformes): A Comparative Cytogenetic Approach Author(s) Ditcharoen, S. (TH)
Bertollo, L.A.C. (BR)
Ráb, Petr (UZFG-Y) RID, ORCID
Hnátková, E. (CZ)
Molina, W. F. (BR)
Liehr, T. (DE)
Tanomtong, A. (TH)
Triantaphyllidis, C. (GR)
Ozouf-Costaz, C. (FR)
Tongnunui, S. (TH)
Pengseng, P. (TH)
Supiwong, W. (TH)
Aroutiounian, R. (AM)
de Bello Cioffi, M. (BR)Article number 3545 Source Title International Journal of Molecular Sciences. - : MDPI
Roč. 20, JUL 2 (2019)Number of pages 18 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords fish cytotaxonomy ; chromosome banding ; FISH Subject RIV EB - Genetics ; Molecular Biology OECD category Genetics and heredity (medical genetics to be 3) R&D Projects EF15_003/0000460 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UZFG-Y - RVO:67985904 UT WOS 000480449300169 EID SCOPUS 85071869183 DOI 10.3390/ijms20143545 Annotation The catfish family Siluridae contains 107 described species distributed in Asia, but with some distributed in Europe. In this study, karyotypes and other chromosomal characteristics of 15 species from eight genera were examined using conventional and molecular cytogenetic protocols. Our results showed the diploid number (2n) to be highly divergent among species, ranging from 2n = 40 to 92, with the modal frequency comprising 56 to 64 chromosomes. Accordingly, the ratio of uni- and bi-armed chromosomes is also highly variable, thus suggesting extensive chromosomal rearrangements. Only one chromosome pair bearing major rDNA sites occurs in most species, except for Wallago micropogon, Ompok siluroides, and Kryptoterus giminus with two, and Silurichthys phaiosoma with five such pairs. In contrast, chromosomes bearing 5S rDNA sites range from one to as high as nine pairs among the species. Comparative genomic hybridization (CGH) experiments evidenced large genomic divergence, even between congeneric species. As a whole, we conclude that karyotype features and chromosomal diversity of the silurid catfishes are unusually extensive, but parallel some other catfish lineages and primary freshwater fish groups, thus making silurids an important model for investigating the evolutionary dynamics of fish chromosomes. Workplace Institute of Animal Physiology and Genetics Contact Jana Zásmětová, knihovna@iapg.cas.cz, Tel.: 315 639 554 Year of Publishing 2020 Electronic address https://www.mdpi.com/1422-0067/20/14/3545
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